Australian swimmer quits Olympics over "misogynistic perverts."

Australian swimmer Maddie Groves has withdrawn from the Olympic trials while taking a swipe at "misogynistic perverts in the sport".

The target of Groves' comments in social media posts was not immediately clear.

Groves, a dual silver medallist at the 2016 Rio Olympics, won't compete at the trials for the looming Tokyo Games starting Saturday in Adelaide.

Groves announced her withdrawal on Instagram on Wednesday night, then went further on Twitter on Thursday.

"Let this be a lesson to all misogynistic perverts in sport and their boot lickers," she wrote.

"You can no longer exploit young women and girls, body shame or medically gaslight them and then expect them to represent you so you can earn your annual bonus.

"Time's UP."

The 26-year-old who has endometriosis and adenomyosis reposted her Tweet to Instagram, adding: "Putting this on the feed for emphasis. Make them pervs quake in fear from the number of people supporting a statement that threatens their existence."

Last November, Groves detailed on Twitter that she had complained about a "person that works at swimming making me feel uncomfortable the way they stare at me in my togs".

Groves alleged the perpetrator had been promoted.

She followed up her tweet on December 1 saying; "Woah guys this may have worked. Next time you have a weirdo stare at your tits and your complaints fall on deaf ears, try tweeting about it.

"I didn't even say where they worked so good on that workplace for immediately knowing it's their shitness. Did they recognise my complaint because they already had it on file".

Swimming Australia has been contacted for comment.

Australia, Singapore agree on travel plan.

Scott Morrison has got off to a flying start on a three-nation tour by reaching a deal with Singapore to work on the conditions for a travel bubble.

Mr Morrison made a brief visit to Singapore on Thursday for talks with his counterpart Lee Hsien Loong.

It was the first stop on his way to Cornwall for the G7 leaders' summit, as well as trade and security talks in London and Paris.

Singapore and Australia PMs agree to work towards an air travel bubble https://t.co/IQgymQmUNc

— The Straits Times (@straits_times)

Over the past week Singapore has recorded an average of just four local COVID-19 cases a day, with its vaccine rollout well under way, restrictions easing and rapid test kits about to go on sale to the public in pharmacies.

Mr Morrison said systems will be put in place to enable the two countries to open up in a similar way to the Australia-New Zealand bubble "when we are both in a position to do so".

"There is nothing impeding us - as we discussed today - from getting on with the job of putting systems in place that will enable such a bubble to emerge between Singapore and Australia," he said.

Students would get priority when the bubble was established.

The two leaders signed a memorandum of understanding on health care and health technology and agreed to start talks on a "fintech bridge" which would make it easier to cooperate on financial technology.

Grandmother shot dead after opening front door near Newcastle.

The murder of a woman who was shot dead after answering her front door in the NSW Hunter was almost certainly targeted, police say.

Stacey Klimovitch, 61, was shot in the chest at a home on Queen Street in Stockton, outside Newcastle, after 8pm on Wednesday. Her 31-year-old daughter and eight-week-old granddaughter were inside the home at the time.

The woman died at the scene and police are investigating the incident. The killer is believed to have fled the scene by foot.

Stacey Klimovitch 'scared to leave home' before murder in Stockton https://t.co/AIEr3MvoO1

— Newcastle Herald (@newcastleherald)

Detective Superintendent Wayne Humphrey admitted police currently have no major leads on the case and appealed to the public for information on the killing.

"I'm convinced it is a targeted attack, for what purpose I don't know," he said.

"It's horrendous, an innocent person who's answered the front door of her home and been shot in the chest and killed in the presence of a relative and child ... it doesn't get any worse, I really want the public to step up.

"I don't anticipate anything will happen very quickly, it'll be hard work."

Victoria still on edge as virus rules ease.

Victoria's latest COVID-19 challenge is far from over, despite the end of the Melbourne lockdown and the further easing of regional restrictions.

As the relaxed rules came into effect at midnight on Thursday, health authorities were trying to work out how four members of a Melbourne family with no known links to current outbreaks tested positive for the virus.

Also on Thursday, wastewater detections of the virus were reported in the suburban Pascoe Vale, Scoresby and Vermont areas.

Six more public exposure sites were added for Bundoora, Heidelberg and Thomastown in Melbourne, dating from May 28 to June 7.

Reported yesterday: 4 new local cases and no new cases acquired overseas. - 20,784 vaccine doses administered - 23,679 test results received More later: https://t.co/lIUrl1hf3W Got symptoms? Get tested. #COVID19VicData #COVID19Vic [1/2] pic.twitter.com/k4iMcPmaaq

— VicGovDH (@VicGovDH)

While the easing of restrictions went ahead as planned, Melburnians must continue to wear masks indoors and outdoors.

Thursday's four new cases are from the same Reservoir household in Melbourne's north.

There are 78 active cases across the state, down five from Wednesday.

Anxious wait for coronavirus tests in Queensland.

Authorities are anxiously awaiting coronavirus tests that will show if a Victorian couple who went on an interstate road trip infected anyone in Queensland.

Queensland Health has identified 17 close contacts of the couple, but so far only has results for three of them.

They've been negative, including the infected woman's parents, with whom the couple stayed at Caloundra